Answer:
C = 15
Step-by-step explanation:
Both (7c-7)° & (6c-8)° if get combined will form a straight angle i.e. 180° because both the angles lie on the same line. So,
[tex]7c - 7 + 6c - 8 = 180°[/tex]
[tex] = > 13c - 15 = 180°[/tex]
[tex] = > 13c = 180 + 15 = 195[/tex]
[tex] = > c = \frac{195}{13} = 15[/tex]
